Note 9 - Discontinued Operations (Details) - Balance Sheet Data for Discontinued Operations (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restricted cash	$ 1,193	$ 1,192
Receivables, net	7,639	4,380
Costs and estimated earnings in excess of billings	77,366	67,740
Inventories		386
Prepaid expenses and other current assets		253
Property, plant and equipment, less accumulated depreciation	1,242	2,803
Other assets		4,021
Total assets	13,925	15,810
Accounts payable	2,281	3,225
Accrued expenses	1,711	1,660
Total liabilities	3,992	4,885
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Costs and estimated earnings in excess of billings	$ 3,851	$ 2,775